OpenRA doesn't have its own Wikipedia article because it is not notable enough. Being notable is mainly determined by the number and quality of independent sources that mention a subject.
http://en.wikipedia.org/wiki/Wikipedia:N

So in order for OpenRA to have its own article, we need independent sources on it that can be referenced.

One way to accomplish this would be making game magazines and websites review OpenRA. The most popular gaming magazine is PC Gamer ( http://www.pcgamer.com ). PC gamer has a user forum where people discuss games. And it also has a section called free games at http://www.pcgamer.com/category/free-pc-games/ . OpenRA could easily be reviewed there.

Just by bringing OpenRA to their attention. Most people don't even know there is an open source Red Alert game. And I think OpenRA will be much more popular and attractive once it supports Tiberian Sun and Red Alert 2. Because these games have huge and active modding communities that develop completely different mods.

Vote for us at http://www.linuxgameawards.org/ however I don't think this project will ever be notable enough for an Wikipedia article. What we do here does not justify an encyclopedic article next to Newtons Law and the Theory of Evolution.

OpenRA is superior to this engine in many ways. If that's notable then OpenRA is doubly so.
And Newton's law is insignificant compared to the OpenRA physics engine. The evolution of base structures as they spread over the map, assimilating ever more territory through base walking is a much more important phenomenon than the beaks of some stupid finches.

Those mention us, but none of them (except maybe TotalBiscuit, but that is a video podcast) actually give any insight. Looks like we need to write a Gamasutra article or get interviewed so you have more material to write about.

New strategy: Lock Matt in a room with a popular blogger and don't let them out until there is a (favourable) review of OpenRA + interview with a dev on their site. All in favour?

Is it possible for one of us to simply create a wikipedia article for it? I'm not sure how it works but I don't see why it would get taken down...

Also what would be really nice would be a wiki of our own to host things like unit stats and tech trees. I know there's a bounty on an ingame/automated thing for this but a fan-maintained wiki might be doable?

Wow, today I learned they actually have rules for deleting information about things that are arbitrarily "not notable". Here I was with the impression that Wikipedia was simply an information store, and leaving any stone unturned would simply be a loss of information. But hey, rules are rules, won't go there.
I think I might work on a nice pretty tech tree before bothering too much with manual information gathering/storing in a wiki.

Of course those sites should also be improved but Wikipedia is different. It is for the general audience and it is general purpose. A Wikipedia article shows the maturity, quality and popularity of a project. And it would bring OpenRA to the attention of people who otherwise wouldn't know that there is an open source implementation of Red Alert.

And Wikia is not exactly an encyclopedia, it is specialized on entertainment. Having an article in a universal encyclopedia would have a considerable impact.

Also the big selling point of OpenRA is that it brings the games/mods it supports to Linux and Mac OS. These games were originally only supported on Windows. This is a huge gain for Linux gaming which has a big potential and is rapidly growing. SteamOS is an important indication of this.